What are the primary components of the integumentary system?

The correct response identifies the primary components of the integumentary system, which includes the skin, hair, and nails. The integumentary system is the body's outermost layer and serves several vital functions, including protection against environmental hazards, regulation of body temperature, sensory perception, and the production of vitamin D.

Skin is the largest organ in the body and acts as a barrier to protect underlying tissues from pathogens, chemicals, and physical trauma. Hair contributes to protection, warmth, and also plays a role in sensory functions. Nails serve to protect the tips of fingers and toes and assist in grasping and manipulating objects. Together, these components work cohesively to maintain the integrity and health of the body’s surface.

Other options present systems or components that are unrelated to the integumentary system. Blood, heart, and vessels pertain to the cardiovascular system, while muscles, tendons, and ligaments are elements of the musculoskeletal system. Bone, cartilage, and joints relate to the skeletal system. Therefore, the components mentioned in the correct answer directly align with the integumentary system's structure and function.